Swinging jaw mounting and lubricating means



Nov. 25, 1958 J. R. KUENEMAN ETAL 2,351,749

swmc'mc JAW MOUNTING AND LUBRICATING MEANS Filed Oct. 17, 1955 vINVENTORS JaH/v R. KuEA/EMa/v mvo Da/v KUENENHN ATTORNEY United Statesmom SWINGING JAW MOUNTING AND LUBRICATING MEANS John R. Kueneman and DonKueneman, Oakland, Calif.

Application October 17, 1955, Serial No. 540,766

' 8 Claims. (Cl. 241-262) The invention relates to a crusher orpulverizer having a swinging jaw cooperative with a fixed jaw to definea downwardly-tapering crushing zone, and this application comprises acontinuation in part of our copending application Ser. No. 48,184 filedSeptember 8, 1948, now Patent No.-2,721,036 issued October 18, 1955. iIn crushers of the present type having a crushing jaw swinging onlubricated bearings about a fixed horizontal support shaft, it isparticularly important that provision be made for taking up wear axiallyof the shaft while adequate lubrication is provided and maintained forthe bearings, and the present invention particularly relates to suchaccomplishments.

Accordingly, it is a present object to provide for the taking-up of anywear which may occur at the ends of the shaft-receiving bore of acrusher jaw, or other heavy-duty working element, swinging about asupport shaft having its axis horizontal.

Another object is to provide a means for taking up any end wear withoutrequiring a dismounting of the support shaft.

A further object is to so mount a jaw supporting shaft as to facilitateits mounting and dismounting on a carrying frame. I

An added object is to provide an improved lubricated jaw-support shaftprovided with a particularly effective means for retaining the lubricantat the support bearings.

' The invention possesses other objects and features of advantage, someof which, with the foregoing, will be set forth or be apparent in thefollowing description of 4 a typical embodiment thereof, and in theaccompanying drawings, in which:

Figure 1 is a fragmentary upright and partially sectional view taken atthe supported upper end of the movablejaw.

Figure 2 is an enlarged fragmentary sectional view of the structureshown in Figure 1.

Figure 3 is asectional view taken at the line 33 in Figure 2.

Figure 4 is a partial section taken at the line 44 in Figure 3.

Figure 5 is a perspective broken-out view of bearing ring of thestructure.

Figure 6 is a face view of a sectional shim of the structure. 7

Noting that U. '8. Patent No. 2,721,036 of reference discloses theoscillatively hinged mounting of a jaw 23 on a shaft supported on andbetween relatively fixed frame sides in a manner which does not providefor a ready taking-up of any wear which may occur at the ends of theshaft-receiving bore of the swinging jaw 23, the herein-described andillustrated structure discloses 'an alternate support means for a shaftor hinge pin 231 carryingthe jaw 23 in an arrangement which not onlyprovides for a taking up of any wear between the opposed faces of themounted jaw and the frame sides without requiring a dismounting of a jawsupport shaft 231, but also a thrust- "ice provides a generally moreready mounting and dismounting means for the shaft. Across its upperend, the jaw stock of the jaw 23 is provided therethrough with a borehaving its end portions fixedly mounting therein bearing sleeves orbushings 61 journalled on the shaft 231, and an intermediate boreportion which defines a portion of the closed reservoir space 62 forcontaining a lubricant for the shaft, which lubricant may be supplied tothe reservoir space 62 at a filler opening provided at the top of thejaw stock and normally closed by a screw plug 63. In the presentstructure, the fixedly spaced frame side plates 224 and 225 differ fromthe frame side plates of our identified prior patent only with referenceto the manner in which the jaw-supporting shaft 231 is mounted at theirtop portions, and the bearing lubricant sealing-in means which includesthe torsionally distortable sealing sleeves 64 which are operative topositively prevent a radial escape of lubricant at the jaw sides.

It will now be noted that the jaw-supporting shaft 231 most convenientlyhas a uniform circular cross-section along its length, and has endportions 231" thereof arranged for their normally clamped engagement inaligned complementary bores 226 provided in corresponding upper portionsof the frame sides 224 and 225. In the present structure, radial andaxial slots 227 extend upwardly from the bores 226 to the tops of theframe plates 224 and 225 and between opposed ears 228 extending upwardlyfrom the plates at opposite sides of the slots and engagcable byclamp-bolts 229 which are extended through aligned holes through theears 228 and are normally cooperative to effect a centered gripping ofthe shaft ends 231 within the bores 226. Since the frame plates 224 and225 will usually comprise relatively thick and rigid elements, therelease of a shaft and engaged in a bore 226 will not normally beefieotable solely by releasing the clamp bolts 229 thereat and requiresa positive forcing apart of the ears 228 for opening the bore 226 torelease a shaft end which has been fixedly clamped therein.

As particularly shown, one car 228 of each pair thereof is providedoutwardly of the bolt holes therein with threaded holes which arearranged to receive normally withdrawn thrust bolts 230 which may beprojected against the opposed ear as a means to separate the ears asrequired to open the bore 226 to facilitate the mounting or dismountingof a shaft 231 with respect to the holes 226, or to release the shaftend 231' engaged in either said bore; Means may be provided forpositioning the fixed jaw supporting-shaft 231 in a predeterminedlongitudinally and rotatively adjusted position in the support bores226; as particularly shown in Figures 2 and 3, a shaft end portionextends outwardly of the frame side 224 and provides a diametrical bore232 which may radially and complementarily receive a positioning pin 233which extends integrally from a base 234 bolted to the outer face of theframe side member 224 and functions to retain the engaged shaft againstits rotation or axial shifting independently of the functioning of theclamp bolts 229.

The extending tubular jaw portions 23 at the ends of the shaft-receivingbore are coaxial'with said bore, and are embraced by corresponding innerends of the previously-described lubricant-tight torsionally flexiblesealing sleeves 64 which have their other ends-fixed to and aboutuniform annular thrust bearings 235 which are arranged to receive theshaft 231 in sealed relation thereto and are fixed to the inner sides ofthe frame plates 224 and 225 in coaxial relation to the bores 226 whichsealedly receive the shaft end portions 231'. As shown, the ends of thesealing sleeves are sealedly fixed to the jawextensions 23 and thethrustrings 235 by mutually spaced clamp bands 236 which are operativeaboutthe sleev'eends assume at the extensions and rings respectively,with the connections corresponding to those for the sleeves 64 asapplied in the arrangement shown in Figures 4 and 10. By ref erence toFigures 2 and 5, it will be noted that a thrust bearing 235 is ofuniform annular form, has its bore freely receiving the shaft 231, andis provided with an interior annular groove 237 in which a suitablesealing O-ring 238 is installed for tight encircling engagement aboutthe received shaft to provide for a full seal against the axial escapeof lubricant from the lubricant reservoir beyond said sealing ring.

A thrust hearing or ring 235 is shown as secured to the opposed side ofa frame member 224 or 225 by the axial engagement therein of thethreaded extremities of a pair of cap screws or bolts 239 slidably andfreely engaged in holes 241 extending through the frame members inparallel relation to the shaft-receiving bores 226 in the members. Asillustrated, the screws 239 are preferably disposed at opposite sidesof, and at equal distances from a vertical plane through the shaft axis,and in a horizontal plane adjacent the bottom of the shaft, and thetightened screws 239 are arranged to draw a shaft-carried thrust ring235 tight against the opposed face of the mounting frame member, oragainst one or more flat shims 242 interposed between the thrust ringand the frame member; in this manner, a thrust ring 235 mounted on theshaft 231 may be fixedly secured to the associated frame member 224 or225 while sealedly mounting the outer end of a sealing sleeve 64. Asparticularly shown, the screws 239 at the frame side 224 are engagedthrough the base 234 for the shaft-positioning pin 233 for fixing saidbase and pin to the frame thereat. It will be understood that theoperative disposal of the attaching screws 239 for the thrust rings 235below the center line of the shaft provides an arrangement in which thescrews and thrust rings do not interfere with a spreading opening of thebores 226 by a thrust action of the bolts 230.

It will be understood that, by reason of the fixed relation of the sideframe plates 224 and 225 in the crusher frame assembly, the combinedwidth of the jaw and the thrust rings 235 at its opposite sides can beno greater than the distance between the frame side elements 224 and225, and would usually be less. Accordingly, and as particularly shownin Figures 1 and 2, flat annular shims 242 are fixedly engaged betweenthe inner face of the frame plate 225 and the shaft-carried opposedthrust ring 235 for occupying the space between the frame sides notoccupied by the jaw and the thrust rings, whereby to prevent anappreciable axial shifting of the jaw 23 along the supporting shaft 231while the crusher is op erating. Also, the installation of additional orthicker shims may be needed between the frame-carried thrust ring andthe opposed frame side for taking up wear as it may occur at the engagedlateral surfaces of the jaw and thrust rings during the use of a presentcrusher, and means are preferably provided for facilitating aninstallation of shims as desired or required without necessitating adisconnecting of the jaw and its support shaft. As is particularlybrought out in Figure 6, a shim 242 comprises complementary sections 242of appropriate outline cooperatively providing the central shim opening244 which receives the shaft 231, it being noted that screw-receivingopenings 245 are provided at appropriate points in the shim sections forfreely receiving the screws 239 as a positioning means for the installedsections. The installation and/or removal of shims 242 may generally beeffected at either or both of the frame sides 224 and 225 as may bedesired or required, and the installed shims preferably occupy allavailable space therefor between the jaw sides and the operativejaw-engaging thrust rings 235 mounted on the frame sides.

A removal or installation of shims 242 is arranged to be facilitated byfirst freeing the shaft at the frame side at which shims are to beremoved or inserted, withdrawing the appropriate cap screw 239 andloosening the other cap screw, operatively applying a wedge or othersuitable thrust means (not shown) between a point of the frame sideadjacent the shaft and an opposed point of the jaw side to thrust thejaw against the opposite frame side while springing the frame apart atthe shaft sufiiciently to free a shim to be removed or provide space foran added or replacement shim. When the permitted removal or insertion ofa first shim section 242' has been effected, the removed cap screw isreengaged with the thrust ring and the loosened cap screw is removed tothereby permit the removal or insertion of the second complementary shimsection, after which the thrust means is removed and both cap screws areoperatively reinstalled to complete the change; it will be understoodthat the described one-at-a-time method of removing or installing theshim sections of a pair prevents a rotary dislocation of the adjacentthrust ring during the operation. For gauging the available space forshims to be added, a said thrust means may be actuated between the jawand a frame side before the corresponding shaft end has been released topermit a mutual spreading of the frame sides, whereby to positively pushthe other jaw side against the opposed thrust ring, after which asliding of the other thrust ring along the shaft and against the opposedjaw side will open the shim-receiving space to be gauged by the use of afeeler plate or other means. In the present structure, all shims areshown as provided at the frame side 225, whereby the installed shaftpositioning pin 233 need not be disturbed when shims are to be mountedor dismounted.

Understanding that crushers of the present type come within the categoryof heavy-duty machines, it will be noted that the arrangement of Figures1 to 6 inclusive provides numerous assembly and operative improvementsover the embodiment of Figures 1 to 15 inclusive of our prior Patent No.2,721,036, all with reference to the lubricated support shaft for arelatively heavy swinging member such as the present movable crusherjaw. Thus, the disclosed manner of mounting and positioning the jawsupporting shaft 231 on and between the frame side plates 224 and 225facilitates the mounting and removal of the shaft from either frameside, while eliminating any need for the precise spacing of the frameside plates required for the shaft mounting disclosed in our aforesaidpatent. Also, the axial lubricant seal provided at the thrust rings 235,by positively preventing an outward capillary or pressure movement oflubricant along the shaft beyond it, eliminates any need for the sealedengagement of the shaft ends with the supporting frame sides as taughtfor the first jaw-support embodiment; the sealing-in of the lubricantthus provided at the shaft in combination with the use of thetorsionally elastic sealing sleeve 64, is understood to provide acompletely dustand-grit tight external seal for the lubricated radialand axial bearings which insures a maximum utility of the lubricantwhile keeping it clean of dust or grit which might penetrate amore-or-less unsealed lubricated zone. Furthermore, the presentprovision for the positively shimmed positioning of the jaw between theframe sides provides a means for preventing an undue lateral shifting ofthe working jaw resulting in a deleterious misalignment of the operatingmechanism causing increased wear of frictionally engaged parts and/orexcessive vibration.

From the foregoing descriptiontaken in connection with the accompanyingdrawings, the advantages of the present jaw crusher will be readilyunderstood by those skilled in the art to which the inventionappertains. While we have described the principle of operation, togetherwith arrangements which we now consider to comprise preferredembodiments thereof, we desire to have it understood that theshowing isprimarily illustrative, and that such changes and developments may bemade,

asimi when desired, as fall within the scope of the following claims:

We claim:

1. In a jaw-type crusher having a frame comprising fixedly spaced sidemembers providing aligned openable bores grippingly carrying a supportshaft between them in fixed relation thereto and a swinging jawproviding a bearing bore having its end portions carrying mutuallyspaced bearing bushings fixed therein and receiving the shaft for asupported oscillation of the jaw thereon between the frame side members,means providing a lubricant admission inlet for the bore intermediatelythereof, thrust ring members receiving the shaft and fixedly related tothe side members in axial opposition to the jaw sides and provided withmeans circumferentially and sealedly engaging the shaft portions foraxially sealing-in the bearing lubricant thereat, torsionally flexibleliquid-impervious sleeves extending between the jaw sides and theopposed frame side members receiving them, and means sealedly fixing thesleeves to said jaw sides and thrust members for radially sealing-in thebearing lubricant thereat.

2. In a jaw type crusher having a frame comprising fixedly spaced sidemembers providing aligned openable bores grippingly engaging ahorizontal support shaft extending between them and a swinging jawproviding a bearing bore receiving the shaft for the supportedoscillation of the jaw thereon between the frame side members, alubricant admission means for said bore intermediately thereof, annularthrust rings slidably mounted on the shaft between the frame sidemembers and the opposed jaw sides, sealing rings operative between thebores of the thrust rings and the received shaft for sealing off thebearing lubricant thereat, means fixing a said thrust ring to theopposed frame side member in adjustably shimmed relation thereto, andmeans operative to open a said support bore of the frame.

3. In a jaw type crusher having a frame comprising fixedly spaced sidemembers supporting a shaft between them in fixed relation thereto andmounting a swinging jaw having a bearing bore receiving the shafttherethrough for the supported oscillation of the jaw thereon betweenthe frame side members, a lubricant admission means for said bearingbore of the jaw intermediately thereof, thrust bearing rings slidablymounted on the shaft between the frame side members and the opposed jawsides, sealing rings operative between the bores of the thrust bearingrings and the received shaft for sealing off the lubricant thereat, andscrews releasably attaching said thrust bearing rings to the opposedframe side members to provide for the insertion of a spacing shimbetween a thrust bearing ring and the opposed frame side for reducingany side play of the jaw between the frame side members.

4. In a jaw type crusher having a frame comprising fixedly spaced sidemembers fixedly supporting a jawmounting shaft between them, a jawmember providing a bearing bore receiving the shaft for the supportedoscillation of the jaw thereon between the frame side members, alubricant admission means for said bore intermediately thereof, annularthrust rings slidably mounted on the shaft between the frame sidemembers and the opposed jaw sides, sealing members operative between thebores of the thrust rings and the received shaft for sealing off thebearing lubricant thereat, a pair of screws attaching said thrust ringsto the opposed side frame members to provide for the insertion of aspacing shim between a thrust ring and the opposed frame side, and ashim having complementary sections arranged for their mounting incooperative relation between the thrust ring and the frame side and eachproviding a transverse opening for receiving a different said screwtherethrough for positioning the mounted shim sections in cooperativerelation.

6 5. In a jaw-type crusher having a frame comprising fixedly spaced sidemembers non-rotatively carrying a support shaft between them in fixedrelation thereto and a swinging jaw providing a bearing bore receivingthe shaft for a supported oscillation of the jaw on the shaft betweenthe frame side members, means providing a lubri- .cant admission inletfor said bearing bore intermediately thereof, thrust ring membersreceiving the shaft and fixedly related to the side members in axialopposition to the jaw sides and provided with means circumferentiallyand sealedly engaging the shaft portions for axially sealing-in thebearing lubricant thereat, torsionally flexible liquid-impervioussleeves extending between the jaw sides and the opposed frame sidemembers receiving them, and means sealedly fixing the sleeves to saidjaw sides and thrust members for radially sealing-in the bearinglubricant thereat.

6. In a jaw-type crusher having a frame comprising fixedly spaced sidemembers non-rotatively carrying a support shaft between them in fixedrelation thereto and a swinging jaw providing a bearing bore receivingthe shaft for a supported oscillation of the jaw thereon between theframe side members and having its sides spaced from the frame sidemembers, means providing a lubricant admission inlet for said bearingbore intermediately thereof, thrust ring members receiving the shaftportions between the jaw sides and the side members and fixedly relatedto the latter members in axial opposition to the jaw sides and havingtheir bores provided with means circumferentially and sealedly engagingthe shaft portions for axially sealing-in the bearing lubricant thereat,torsionally flexible liquid-impervious sleeves extending between the jawsides and the opposed frame side members receiving them, and meanssealedly fixing the sleeves directly to said jaw sides and thrustmembers for radially sealing-in the bearing lubricant thereat.

7. In a support for an element arranged for its oscillatory rockingabout a horizontal axis defined by a bearing bore through the element, aframe having fixedly and transversely spaced side members, a shaftextending through and from said element bore and having its extendingportions fixed to said frame side members, thrust bearing rings carriedon the shaft in axial opposition to the element sides and fixed to theopposed frame side members and provided with sealing rings engaging thereceived shaft portions for axially sealing-in the lubrication thereat,and torsionally flexible liquid-impervious sleeves di rectly connectingthe bearing rings and the opposed element sides in fixed sealedengagement therewith.

8. In a support for an element arranged for its oscillatory rockingabout an axis defined by a bearing bore extending through the elementbetween opposite sides thereof, a frame comprising spaced side members,a shaft journalled in said element bore and having extending ends fixedto said frame members, means for introducing a bearing lubricant at anintermediate point of the element bore, thrust ring members receivingthe shaft and fixedly and detachably related to the frame side membersin coaxial relation to the element bore and in opposition to the elementsides and provided with sealing rings engaging the received shaftportions for axially scalingin the bearing lubricant between the sidesand members, and spacing shims engaged between a thrust ring member andthe frame side member which mounts it.

References Cited in the file of this patent UNITED STATES PATENTS1,746,212 Beringer Feb. 4, 1930 1,987,762 Symons Jan. 15, 1935 2,134,876Hull Nov. 1, 1938 2,177,524 Gruender Oct. 24, 1939 2,302,723 Symons Nov.24, 1942

